Morphology Control for Suppressing Degradation of Organic Solar Cells & Extracting Charge Carrier .. скачать в хорошем качестве

Morphology Control for Suppressing Degradation of Organic Solar Cells & Extracting Charge Carrier ..

Title：Morphology Control for Suppressing Degradation of Organic Solar Cells & Extracting Charge Carrier Mobility in Organic Solar Cells | 薄膜学会 Speaker：Prof. Xiaoyan Du、Prof. Hang Yin Beijing Time：January 31, 2024 (Wednesday) 14:30 Title: Morphology Control for Suppressing Degradation of Organic Solar Cells Bio: Prof. Xiaoyan Du Department of Physics, Shandong University, Jinan 250100, China E-mail: duxy@sdu.edu.cn Professor Xiaoyan Du received PhD degree from Friedrich-Alexander University Erlangen-Nürnberg (FAU) in 2017. After postdoc training in FAU and Helmholtz-Institute Erlangen-Nürnberg (HI ERN), she joined Shandong University in 2021. Her current research interests are optoelectronic devices based on organic semiconductors. Title: Extracting Charge Carrier Mobility in Organic Solar Cells Bio: Prof. Hang Yin Department of Physics, Shandong University, Jinan 250100, China E-mail: hyin@sdu.edu.cn Professor Hang Yin is a Professor working at School of Physics in Shandong University, China. He obtained BS degree from Qufu Normal University, MS and PhD degrees from Hong Kong Baptist University. He was a postdoctoral fellow in Hong Kong Baptist University and Hong Kong Polytechnic University. His current research interests are charge carrier transport and film defect analysis in organic semiconductors. Abstract: Mobility is a critical parameter influencing the overall performance of organic solar cells (OSCs). Herein, we innovatively elucidated the intricate interrelation between the photovoltaic molecular structures and the methodologies employed for the extraction of charge carrier mobility in OSCs. We proposed a simple yet effective principle to accurately extract charge carrier mobility values using the standard space-charge-limited current (SCLC) measurement, while critically assessing theoretical and experimental deficiencies through the drift-diffusion analysis. It was found that field-dependent charge transport is necessitated to describe the prominent long-range intrachain hopping carrier behavior in polymers, while short-range intermolecular hopping results in trap-involved charge transport within small molecular acceptors. Based on the above understanding, a synergetic inter/intra-molecular hopping strategy was proposed to fabricate thick-film all-polymer OSCs, and an unprecedented power conversion efficiency (PCE) of 16.61% was achieved in the 300 nm PM6:PY-IT OSC. This work not only presents a precise and straightforward approach for measuring mobility values, but also provides a significant reference about charge carrier transport to make optimal decisions regarding photovoltaic material design and device fabrication process of high-performance OSCs.